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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT04324853
Other study ID # PROT N°038/2018/SG/CNE
Secondary ID
Status Completed
Phase
First received
Last updated
Start date January 28, 2019
Est. completion date December 31, 2022

Study information

Verified date April 2023
Source Centre de Recherche Médicale de Lambaréné
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

Purpose: To examine whether helminth infection during pregnancy alters Vitamin-D-metabolism and reactivity of the child's immune system Hypothesis: Helminth infection during pregnancy is associated with altered Vitamin D levels and Vitamin D receptor expression in the placenta and modified immune reactivity in the infant.


Description:

Objectives The primary objective of the proposed research project is to study the impact of helminth infection in general and particularly of infection with S. haematobium during pregnancy on Vitamin D metabolism and its related factors as well as the impact of maternal infection on infants developing immune system and health. Specific Objectives To assess the effect of maternal helminths infections on Vitamin D and vitamin-D-related factors in the serum of pregnant women and cord blood of their infants, To assess the effect of helminth infection on placental biology: Determine expression levels of VDR and inflammatory genes Investigate histologically the gestational age and other functional aspects of the placenta Determine the influence of helminth driven inflammation and helminth antigens on placental tissue by establishing a (co-)culture system using primary placental cells and a placental cell line To assess whether helminth infections influence the infant's peripheral immune system by analyzing composition, reactivity and lineage determination of fetal cord blood mononuclear cells (CBMCs) in relation to the maternal and fetal immune and Vitamin D status. Current study focusing objectives In the present study the investigators explore if and how Vitamin D and its related signals are modulated by helminth infection and how helminth infection could thereby shape the developing immune system of the newborn by analyzing CBMCs.


Recruitment information / eligibility

Status Completed
Enrollment 180
Est. completion date December 31, 2022
Est. primary completion date December 31, 2022
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Female
Age group N/A and older
Eligibility Inclusion Criteria: - Pregnant women attending antenatal care from Lambaréné and Fougamou areas - Pregnant women who have given written informed consent to the study for herself and for her unborn child and live infant. Exclusion Criteria: - Known of chronic infections and diseases(e.g. diabetes, HIV, Hepatitis B and C, anemia).

Study Design


Related Conditions & MeSH terms


Intervention

Diagnostic Test:
Microscopy ( Urine filtration), UCAA test, qPCR,
Schistosomiasis is an acute and chronic parasitic disease caused by blood flukes (trematode worms) of the genus Schistosoma.Schistosomiasis is prevalent in tropical and subtropical areas, especially in poor communities without access to safe drinking water and adequate sanitation.
Microscopy (Kato Katz, Coproculture, Harada Mori, MIF), qPCR,
Soil-transmitted helminth infections are among the most common infections worldwide and affect the poorest and most deprived communities. They are transmitted by eggs present in human faeces which in turn contaminate soil in areas where sanitation is poor.

Locations

Country Name City State
Gabon Josiane Y Honkpehedji Lambaréné Moyen Ogooué

Sponsors (3)

Lead Sponsor Collaborator
Centre de Recherche Médicale de Lambaréné Technical University of Munich, University Hospital Tuebingen

Country where clinical trial is conducted

Gabon, 

Outcome

Type Measure Description Time frame Safety issue
Primary Association between Schistosoma and helminth infection and Vitamin D levels. Schistosoma hematobium in pregnancy is associated with vitamin D metabolism 48 Months
Secondary Association between Schistosoma infection and intrauterine growth restriction (IUGR) (defined as birth weight below the 10th birth weight percentile), stillbirth and premature delivery. Schistosoma hematobium infection during pregnancy is associated with a birth weight born child 48 Months
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